Explicitly export rather than pub use mod::*.

[waywardmonkeys]

This makes it easier to see what the actual API is and what's coming from where.

[DJMcNab]

The style I used in Xilem Core was:

mod whatever;
use whatever::{...};

mod something_else;
use something_else::{...};

But I'm generally in favour of this. We should probably have unreachable_pub enabled

[raphlinus]

Agreed, this is better. I can see I'm the one guilty of the original pattern, which dates back to the very first commit.

[waywardmonkeys]

@DJMcNab That style felt too verbose here ... not sure why the difference in feel.